In May 2008, BBC television cameras covering traffic on the M6 motorway near Manchester captured something nobody expected: two women wandering onto the carriageway and throwing themselves in front of moving vehicles. The women are Ursula and Sabina Eriksson, Swedish sisters whose bizarre, synchronized breakdown played out live on air and then continued in the hours that followed, ending in a fatal stabbing and an unexplained leap from a motorway bridge. This film uses that BBC footage alongside police accounts, witness statements, and medical commentary to reconstruct what happened that day and to ask what could cause two adults to mirror each other's actions with such intensity. Psychiatrists raised the possibility of shared psychotic disorder, sometimes called folie à deux, where one person's delusion transfers to someone close to them. The film stays close to the documented timeline rather than speculation, letting the strangeness of the recorded events, and the difficulty doctors had explaining them, carry the story.